Subject: Re: [bitcoin-dev] BIP148 temporary service bit (1 << 27)

From: Mark Friedenbach <[email-masked]>
Date: Mon, 19 Jun 2017 13:24:25 -0700

It is essential that BIP-148 nodes connect to at least two other BIP-148 nodes to prevent a network partition in August 1st. The temporary service but is how such nodes are able to detect each other.

> On Jun 19, 2017, at 12:46 PM, Tom Zander via bitcoin-dev <[email-masked]> wrote:
> 
>> On Monday, 19 June 2017 21:26:22 CEST Luke Dashjr via bitcoin-dev wrote:
>> To ease the transition to BIP148 and to minimise risks in the event miners
>> choose to perform a chain split attack, at least Bitcoin Knots will be
>> using the temporary service bit (1 << 27) to indicate BIP148 support.
>> 
>> Once the transition is complete, this will no longer be necessary, and the
>> bit will be (manually) returned for reuse.
>> 
>> I encourage other software implementing BIP148 (both full and light nodes)
>> to set and use this service bit to avoid network partitioning risks.
> 
> I'm curious what you action on the finding (or not) of a peer with this bit 
> set (or not).
> Can you link to the github commit where you implemented this?
> -- 
> Tom Zander
> Blog: https://zander.github.io
> Vlog: https://vimeo.com/channels/tomscryptochannel
> _______________________________________________
> bitcoin-dev mailing list
> [email-masked]
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev